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RADIO SET 

AN/PRT-] 



C- ..1 






w A /* n /■; /' .1 />' r m /-: \ r / a J r s r: i :> ; 




WAR DEPARTMENT, 
Wasihn(;to.n 2y, 1). C„ 16 June 1945. 

TM U-2o9, Rndio Set AN I'RT-l. is publishod for thti inform- 
ation and guidance of all coitctii-iied. 

[A, G, :',nv.7 rU.i ^TaiX'h 4o).j 



F>y Ordkr ot-' the Secret a ky of War 



G. C. MARS HAT -L. 

(:hi(f of ShiJ!. 



Opeu'Ial: 

J. A. L'LIO, 

Mftjor ( rc- )/.(■■ t'ff I, 

Th( Ad.jitiitsif (Uitcr'iL 

Dii^mnnnos : 

AAF (2); AGF (2): ASF (2); T of Opii (2); 
Dt'pt (2) ; Drf Comd (2) : Arm & Sv Bd (2) : S iJiv 
ASV 0): T('ch Sv (2); SvC (2); I'E (2): Gon 
Overseas SOS Dep (Si^ Svc.) (2): Dep H f^): 
Gen & Sp Sv Sch (2) ; US-AIA ( 10) ; WDGS I.ib (5) ; 
I.ab 11 (2) : A (2) ; Thvce (:i) copies lo ea<:;h of the 
following: T.()& E 11-107; U-127; 11-587; ll-ri92; 

n-oi)7. 

( h'or twiihiiialion ot' symbols sec VM 21-t).) 



vl- 



TABLE OF CONTENTS 



PART ONE. Iiilroductioii. 

Section L Description of Radio Sol AN ■■-IMrr-l. 

General I 1 

Applic^ition 2 1 

Toohnical c}nu■at:loristic^^ of" 

Ra<!ioSot AN lMtT-1 3 X 

Table of components 4 2^ 

rack;ij^"ing data ^y i— 

I )oscri lotion of major 

comI^<Mlent;^ 6 vv 

n. Installation of Radio Set AN -PRT-l, 
l.'npackiiig. uncrating, and 

chocking 7 I 

In^tallatioji of ball e riot; 8 >> 

PART TWO. Operating instructif>ns. 
Sod ion IIR C^ontrol^ and ihei]' nsc. 

Transmittor controls !> o 

\\\ (')]M-^ration. 

General 10 r 

Testing H 7- 

StaT'ting procedni'e fni- 

delayed opcivLliuii VI $ 

Instantaneous 0[}eratLon 

instructions .., . . XT 'D 

Master s\\-iU-h . . IT ."l-i 

Use 1^ W 

Antenna arrangrmeiUs Ifi \l 

PART THREE, ^lainlenance iiisiriictions (not used}. 

PART FOUR. Auxiliary ecjinpmt^iH (not used). 



HI 



lABLK OF CONTEXTS 



PART FIVE. Rcpaj]^ iji^tructioiit^ 
Wot'lion \\ Theory oT equii^mnnl. 

General 17 M 

Sirnplifuxl sclicmatic dia^^a^am , . 18 ;17 

VI, Tvoiible shooting (not used). 
VIL Rt^ pail's. 

General 19 20 

Unsatisfactory Equiprruiiit 

Keport 20 20 

VIIL AiignnK^nt and adjustment (not used). 

APPENDIX. 

Soction L\. Roforoncos. 

rnblicavions 21 24 

Forms 22 24 

Abbreviations 2-] 24 

Glossary 24 24 

X. Mai ntena rice parts. 

Maintenance parts for 

Radio Set AN PKT-1 25 24 



LIST OF ILLUSTRATIONS 



1 K^tdi(l Set AN 1^R4^-1 VT 

2 Radio Set AX PUT- 1, transmiller unit -i 

:\ Transmitter unit, showing location of wingnuts. 4 

4 Transmitter unit, end plate i'eraoved 5 

T) Trai^smitter unit, flisassembled 6 

(1 Time elork set tor delayed ojieratioti S 

7 Time cloek s*^t for instantaneous operation 9 

5 Vertical antenna arrangement 11 

9 Alternate antenna arrangement, dii-ectional . . , . 12 

10 AIternat(^ antenna arranKemei]l. noinlireet ional . 12 

11 Ti'ansmiltor unit, schematic diayi'am IS 

12 WJ).. A.G.U, Fnrm No. ICS with sample entries. .2^^t^ 

rv 



DESTRUCTION NOTICE 

WHY — 'I'o prevent the enemy from usiiiK or salva^^nng this equip- 
ment for his benefit. 

WHEN — When ordered by your commander. 

HOW — 1. Smash — Use sledges, axes, han duxes, pickaxes, ham- 
mers. cro^^'ba]■s. ht^a\y tools. 

2. Cut — Use axes, hand axes, machetes, 

3. Burn --IS-^i': K^isoline, kerosene, oil, flame ihro\vers. 

incendiary ^n'cnades- 

4. Explosives — U'se firearms, grenades, TXT. 

5. Disposal — Bury in slit tr(^jiches, fox holes, other 

holes. Throw in streams. Scatter, 



USE ANYTHING IMMEDIATELY AVAILABLE FOR 
DESTRUCTION OF THIS EQUIPMENT. 

WHAT — 1. Smash — Batteries, reels, transformer, clock, s\\'irch, 

spark gap, coils, and capacitors. 

2. Cui. -—Wires and rope. 

3. I? urn — Housing, technical manuals, 

4. Bury or scatter — Any or all of the above pieces afler 

breakiriLT, 

DESTROY EVERYTHING 




. X -S. . =■ 









, -o * -^ ■ 



:■■> ji ■ 
^f?^'=* - 

^ ■■r.:f< - 











PART ONE 
INTRODUCTION 



SECTION I 
DESCRIPTION OF RADIO SET AN/PRT-1 

h GENERAL 

Radio Sri AX TliT-l is an rxin^ndabh; liiirraj^-e-tyije j:nnnier 
tV^r u^v :iti"^^i!is1. eiH^niy radio t'otTinnniicMtiotis. Thr ]'adi(j s^^d trajis- 
mils rntitinuous i>road-band spark si^i:njds i'!lV('ti\"i? (urr a wvy 
\\\[\v l'vi\\uvncy r;ni<i-(\ Two transmil tors arr can^ied on a stnndari:! 
QiiarltM'niastor pacldjnard, throo ol' which arc^ sni^^pli^^l ^^■ilh oat'li 
Radio iSol AX 14i'!^-l ( 11k^ 1). If \hv tist^ of Ihi- [uickht^ard is not 
do;siral)lr. fh(^ t.raii>rnilhn-s nia>' hr cai-riod Ity nutans of" a slioulder 
slin^' sLi]4)l]^:d wIlli i^atdi uiiil, INn^std 1 inie oporal infi is j>ro\idrd l>y 
a 1.ini<M' nifrliairsMK or the unils may ho s(;t lo opc^'at^:' irnrnrdiah'ly 
aftoi^ jjlaet^fiii^n^ , 

2, APPLICATION. 

a* General, KadioSot A\ PRT-l (a>nsists ul" a ,u"!'(uip ol" six nnils 
which ro\-i^r a froM'.ioticy haf^l fd" IKin io 7,()')0 kil(;<-y(dos (kcK Tho 
six nnils aiv^ ijn^ialfd lo l>^.^ ]]-r^\..'^\ in a .u'l'onp. 

b. Pov/er Source, h\ii^ {^atdi 1 raiisinitU-r sixlc<^n <h'y-c^-ll ISalU^r- 
it'S 1;A-o7 cojuicctrii in scrios-parallrl lo sujjply i2 vnjls, i;j\(.' a:^ 
i>pc]-atinjr ljt"c of -I i:oii]-s. XiiiC- \-six Batt.ciios [lA-^T aro i-cuuired 
for Radi.^ ^vl AN iMIT^l, 

3, TECHWECAL CHARACTERISTICS OF RADIO SET AN/PRT-1, 



Radio 1 
Radio ^1 
Radio 'j 
Radio 'i 
RaUuf d 
ltadi(^ 'i 
Ty]V' [)\' si 
Antruna 



]"an:^"C 



raiisnol [t 1 
L'arsndtl ':'] 
iansni'lu-| 
I'ansmiLUa 
raiisn^diU'i 
r;n\^nulh"i 



^r-l:l') f^rr-l i^nn tu k:\:!p |. 



T-];u; i'R'! 

"i"-d:!ti !Mr[ 
T-lin PR'i 



1 



1 ,>^^"'^'i to ;-,/>^^!* 



i.j 



riiaJ cm '{ ;t\^ 



:^,^^^i^ to :5.(MHi i 

■~>,<*:^<"» lo T,o(Ki 

(i!!.n][jt'd 

.... .sti'uiL^ld 



KC 

kc 
kc- 

kt; 

kc 

\\':\.\-v 
-w I I'c 



;i. 



(\>iniU'r[u)iso ^^^^^^^^^^B 

Xj.nnl}LM- of" Ul!>i^^ , . , . ^^^^^^^^^^^. lioiu- 

I'yiX" of t ]'aitsnii1.tei^ ^jiiirk 

P(>^\>M- itUl]nj1 hr> 1[) -1 walls tl£.!tH"]HlilV4" 

on rrt^tji.u^iu->- : lowor 
outjml at h]i>"lu'r i'rv- 

I Vjwi.'I" sN]>i)ly ... ....... ,BalU'ri(.^^ l-tA-'^T, 1(> n^- 

(]ui]'(^d Tor i^nclj 1 !':ins- 

com [) [ rl L^ Kad J n Si.- 1 
AX rUT-L 

4, TABLE OF COMPONENTS. 

NOTE; Tto-^ li.-^L is Tuf ;^iin!';il i n I'l -i'M:;! 1 lO!: i:iil>. >i'\- ■.]]//})} in >[-'.n\i • 
})ulil.rri1 inn.-^ ]'o\' :?: I'lji'iriat ijin jj=.'[i ;nrLr■:^■ :■! rc^HjLii -i: ion ol" -:|mi(.' pari.-. 



( ihfrii jiiEicnl 



^^ I 1 1 1 i.ii ■■ I I a.i I M-1 f'l' 1 .1 '! u- 1 1 ^.Wi:.- a r 



i':ii'kaL-i I 

Il:i> liii Ti :!ii--i: ir h- 



i;' 



I ;:i' \\-.t '\'\ •\\\>\\ :' \\v 

'[^ i;^'. riri" J 

l^|.■|■:...a:■.| 
f':!.-k::-r - 

];::■■ I h-- Ti :!ii--irir hr 

T i::7 i"'i;"l' [ 



r:..:.:.--::- 



i;:.l :. I-/III-:: :::r-|- 

■[■ lo'i ][;'r I 

1[m.:., T-;iri-r: 1'rl- 

r I rj ;^!;"l" ] 



1^ 



f':i:-ki.. 



U -i:!! Ii :- r:.aiii-iifnr . 

5, PACKAGING DATA. 

a. General. R:ulii) Sr[ A\ Piri'-l is packcMl iji llu'oo oo\(^-. \\'Ai-b 
[VA[).-^\\\\- U'V i- p;Ludo(l :i\)[] \\vu]\])Vi[ \wtti [i;i|u^i- ;ind pul iiilti ;i 



moist ui"fj>riK>f fax] baj^". 'l^lio units are llint [)i;ict^tl in |>ai>^'i' iarlo]i: 
;nHl pat'kod twt? each in woodvn (.^x]>^)li hnxes. 

b. Packed for Domestic and Export Shipping. 



l\.;-. X... 



ri.iii' ri: ] Ici 


L-fll 1 ■< f ■■ fl 


J.rii.Mni 


< .1 


' \>> 


\ii. 1. 


: in . 


III 


VVHi^l 


! I! 



i:. 



^( f-. 



2it 



6. DESCRIPTION OF MAJOR COMPONENTS, 

KiiiWr^ TrjuismiUeis T-i::;5 IMiT-K T-KIG rR'M, T-]:^w )'KT-L 
^r^l:'>S rRT-l/r-loi> I'lrr-Laiul T-UO IMrr-l arr idenlitaUxrepl 

ft}]' !"]-etiuency riin^a^ ^I'he transmitter unit consists ol" a sjuirk 
trMJr^rnillt^r. liattt^'ies, a countcrj^oise, and an anttinna assem}»],v 
imilt into a iniil, ReU i" to fijjfurc^s 2 and 5. 



COUNTERPOISE 



CARRYING RINGS 



ANTENNA 




COUNTERPOISE 
RETAINING BRACKET 



CARRYING STRAP 



Fiiunr ..\ i^fiilif. S\ f .W /V"/"/"-/, f ta ){.--hf it i i y n t 



: L I339IS 



SECTION II 
INSTALLATION OF RADIO SET AN/PRT-1 

7. UNPACKING, UNCRATING, AND CHECKING. 

'I'hj't'O i>oxes iwi.] usod to ship lliidlo Sol AX I'KT-l. EacVt Ljox 
should he oiH!iio(l i_-a]>;l'i.tl[y with ihe pi^opoi' tools. Sttn^l -^trapiMii^i' 
i:<m be bi'okoii (iiL<i\y with m ci^iw hunirrie]- or tin snips. R^rrnuvo th^ 
tiiiils from the lici of each box with a nail i>ull(;r. wrecking Ijaf, of 
v.\i\w hamnior. and lift unt the ti-iitisnutters and packboard. Take 
^^ach cat-ton cnit o[" I ho ox]Kn'l box before; vemtwinK '.iny packing- 
or paper. Insi^ect each pi(^co cjf etjniprnont as .^non as il is linjiackcd 
Tor any possible darnaj^-e cansod in shipment. 



ANTEhNa 



WINGNUTS 







^ -■¥■.* S 

■>■:.**: 



■ 4-% 






COUMERPOlSEfr^ 






h^iil^n 



'rf'f}ji:-.ffnltrf ttitff^ >ihoii^i n (/ h/r^tlmn n( trnff.fff.'f.f!^- 



8. INSTALLATION OF BATTERIES. 

b. Slijiid llu- iniil ()!i ;i t']-;! ^wvuw-^ P\c.za Yno end v/ith f-he four 

wfnaiiu'i's ur';'^;e.-ri;:G';7 ( iiu'. -"i ') . 

e, ltist;i|i Ij^Lllvl 'y:-' ]]i IJK- s;i;:^^^S lH^nv^drd, ]Ji:iS:in;:; .-[[['r \\]i:\. ihf- 
;:(?si(J\"t^ i-nti {^^HkH' =:;■.■:/.■ l.i:li:i:l ^-i'llTLi'i'd ■ \:- j:';l^'r^l {;::\vn\\^ I'l]. 

f* Tlir i riiiiSfKilU'f is iinu" rr;ul\' In bt; U-sU'ti. 

^^^ — ^— MOUNTING STUDS 



■ , = ■ .■ * ^ jS^-iJ-v . 

■^■?;;i■?■■::^i.■.^x=:^■^**■■■? r.- ■.'. 

■ .. -.^^ ^ ^ ■ >v ^ ■ 











^■■UilJ7;/^^-V.^i^V' ^■ 



^--. 



■WfNG NUTS 



l!399^K 



i'^itiiifi !, j f'nu>'s{{ I f i '. f' -M.-.-.'. ^j'f' ;/!••''• 



MOUNTEr^G STUDS 




SW-2 



CH 



ANTENNA 



WiN-^ 







TLJ33WS 



f'^igtiTf ;'j. Tf'^Of^^h! >> ff-r flrllf, dL^^l .^i^f/hllfh fl . 



PART TWO 
OPERATING INSTRUCTIONS 



NOTE: I'of h^fiirnuuiuii i?ri ih:st royiri^;' \\u.- eHLLi prru^ril tn 3)r'(-\"<-r:1 t-'iM-n^y 



SECTION III 
CONTROLS AND THEIR USE 

9. TRANSMITTER CONTROLS (d-s. 5. iL and 7). 

Ihv cnntrnls for the transniitter unit consist, uj' a master s\\iu-ii 
l.^k (.^onti-()l ;Lpi)itc:a1.ion n\ pn^\■^^r, ami foiii^ urjntrnls liU'utiMl on Uu' 
cinc-kt'aco nl' ea<:}i unit, :is ['nl]i>v\'s: 

a. A levtn" ilisl;dled on the lo\\ur part nt' tho clockfacr pro\](.k^s 
Tor instant or df.MayoH operation, 

b. On ifie front of tiu^ olot-k is a key \\>v \^'in(linJJ:. 

c* Two pointers ar^^ ]n'ovi<led on ihc faee of ilie elock t^>r timing-. 
(/) 'riu> while [M"nnLer sets the lime for n|>eralien to staiT 
( !} Tile blark [ujinter sets the time fnv optM'alion lO stnp. 



SECTION IV 
OPERATION 

10. GENERAL 

Kach unit is n<lju^1e<i for proper funelioninjr diii'inj^^ nianufau- 
tiire and no Jurther adjust nunit should !)e attemi>ltHl. Rafiiu Set 
AX ['K'l'-l is expendable eMuii>menl. If any unit of the set t'aii^ 
to operate [noperly after t)ie following t(\'^t. u^v a new unit atid 
destroy the faulty etLuiprnenl, after lui\in^ tilled out an unsatis- 
factory equipment report ([)ar. 20). 

IT. TESTING. 

a. Set lever on clock to INSTANT posilion( lig. 7). 

b. Sei the master switch to the OX position (fig. .">). A huzzin^^- 
sinnuj shoul<l l^e heard. 



d. If M radio tx?Ci:]\r]- is ;L\-ailal)lc, the lolhnvinj-' t('st l^ I'tu-orn- 

(/) T'lnie ihr ]'eceivor to a ri-e^iueucy uiihin the i^L-ii?.ra <y\' \:\w 
units IjoijiL^- -esU.M]. 

{ ^O Sclt^ct. Uu" Mints 1() be tc^stA;{L ;i]j(i i>];u'e Ilium witiiir: H' Tovt 
of the rucei\t^i\ 

(-;} 'riir{n\- l{-\-fir on ctot:k lo IXSTAXT i^nsiticju ( li^-, 7), 

{ /) 'I'lirow mastc]- switcli Ln OX i)u>it.i.ni. 

(J) If unit is oi.)ei-aljn|yf pi^npci'ly. a roMritig suuiid \^'ill l)0 lioard 

(6") A( ].hv. cnnn>!{^(i(>n oC a]K)V(^ tusl\ thi-ow [nast.ei- switch lo 
{)W positi^kn. 

T2, STARTING PROCEDURE FOR DELAYED OPERATION, 

a, Kacli tran.smitler is equi]>pod ^\'i1h a clock. Th<^ dial roadIu,t^s 
are standard i\rmy-Xa\'y tim(\ ProjJer settinjr of Ihe clock may 
delay thr^ startin;^- {imc of tlio opcrati<ni iov as lonj:=f as 2:"! hours. 

b- 'I'o stl l"or dvUiijvd ^/^7/r>>^ use the folio wi rig procedure: 

(/) Wind the clock with the key pro\-ided- 

(J) I.ooseii the knurled nut one- fourth turn: sel the \\'hite 
pointer to the time desired for tht.^ unit to start operating, 

(^y) Sot the black pointer for the desiixnl time tor the operation 
to ^f<rih The clock cannot !)e set for an operating time ot less than 
1 1.> hours. 



KEY. 



LEVER 




WHITE POINTER 



BLACK POINTER 
KNURLED NUT 



POINTER 



TLI64// 



I'stjtfn ^r, 'I'iittr {"h'fri: hit-t ior ^iflttihfJ opf/tft jaa 



ii: 



(..J) Turi] the dial imlil iht UrMe of day is oi.)|.>osit.(^ ]M;i(iU-*r. 

{.;) Tighten the knurled nut while holdiii*^ Ihe dial, niakiu^- sure 
the \vhit{^ aju3 hhick point eT';> nrv .-^tili in position. 

{u) He ir-.uvi: 11](^ levi!]- is m{)\'ed lo llie llAIl^ position. 

(7) T^-fir off I he })((})<'}' rU'fcJ: dioL 

{S) F(jr an exani]>l<^ of hnw to set the clock, see (i.u'ure (J. Th<^ 
ck)L-k is set to start the unit at 1200 hours and to stoi> at 1600 
hours, 'rhe liin^Mrt" day is 2000 hoiti^s. 

(.^0 Affe]- the ek>ck has Inu'^n set, reassernlde tlie unit. 

13. INSTANTANEOUS OPERATION INSTRUCTIONS. 



KEY 



LOCKING 
SPRING 




WHITE POINTER 



POINTER 



BLACK POINTER 
KNURLED NUT 
LEVER 

TLI6476 



The unit may be set for in^^tantuTieou^ operation; that is. set l.o 
operate the moment the counterpoise reel is removed. 

a. Move lever to IXSl^ANT position. 

b. Lift HI") the locking spring MTid s^vi^g it downward until the 
spring i(^cks in kjn^ ^slot. 

c* Tear ffp p(f.j}rr clock (VlO.L 

d. Reassemble the unit. 

14. MASTER SWITCH, 

To i.n'event at't":idental operation of th<^ transmitter, an auto- 
matic master s\\'iteh is provick^L "^rhe lc\'er of I he master switch 
is connected to the counteri.)oise reel by means of a v>iece (jf soft 
wire. When the cou titer poise reel is removed, this wire ch->ses the 
switch i\ni{ then breaks, thus rendering' the ujiit <j]>erative subject 



9 



to the lime switch on tho clock. The set will n(jr become operative 
until tVie masler s^^■iU■!h has been closed by the removal of the 
counterpoise reel. 

15. USE. 

a* Radio S(^t AX V\IT-1 is most eirectlvo apjainst euomy radio- 
tele]) hone commiiiiicHlion. The transmitters should be placed as 
fiose as ]>ossible to the enemy receivers (not more thcin i- mile 
away). If it is desired to Jam enemy continuous-\^■ave (c-^v) sig- 
nals, the number iff Radio Sets AX TKT-l used must he c<msid- 
erably increased or |}laced in closer proximity to the enem\' re- 
ceiver. Table I shows the ap])roximate jamrninfi: siji'nal streuju^th 
that, can be expected l"rom Radio Set AN. PRT-1 at various dis- 
tances fi^om the transmit! or. 

TABLE I. FIELD STRENGTH OF RADIO SET AN/PRT-1 

T"'if'M .^trcnj^l ti : rri !(-]■( ivniJ! s : 



I 



h. The number of iniits required depends upon the .^trenprth of 
th(^ enemy signals at the victim receiver. The jamminK si^nai shouid 
Uv cMual to, or Ki'oatei' than enemy signals. The field strength 
to be exi^ected from various cnt^my radio sets is hard to prt^iicl. i^ 

Table II gives the approximate i.ransmittod field strength of Radio { 

Set SCR-284, simihir to some enemy equipment. The table may 
sei\e as a K^tide in deciding the number of Radio Sets AN PRT-1 
\o be used, takijig into account the distances involved.^, 

TABLE II. FIELD STRENGTH OF TYPICAL RADIO SET (SCR-284) 

J)i^t'LrK'f- iiEiik--- I'iclil sncij!j;[ li j]jirrii\"cjLT> i 

d 40 

■:^ 10 



m 


tl: 


•20 


•in. 


<fr» 


47 


;{V>- 


'\V- 


n 


in 


M 


'2^- 



'i-. 



4 



■1:0 



16. ANTENNA ARRANGEMENTS, 

a* Figurt^ 8 .-^iiows the iuU.eruia placed in a tree to ]jrovide a 
!M)-toot vei'licrU radiator, in actual u^^e it may be imi>os:<ible lo 
atdiit^ve tliis heiji'hl, i[o\vr\-er, {^very effoj^t should be made to Kel 
the lUitenEia a:^ hi^h a.-< |.>u.ssible. ^rhe counterpoise should be uji- 
reeied and laid on the ^ixtund in a scrambled fashion a) Mail the 
unit. This arraiiyenieni wiH radiate the .sanif.^ sij^-nal slrength in 
all d]r(;ctions. 




cuuHTEP^POise 



*? cc.\:-'\^z-fi-\^--r 



FiVf^f' N. \f.'ftif:nl (itf!ih.M(> \f f-rUfUf*:' fiic^il. 



a 



'-7 




..T. l^liJ^T^ — :i 






-5^H=v 



-^ENEMY- 



t.> 



*>■ 



90 f.;^.^-' 



..^^?^- 



COUMERP0I5E 



^>. 




"^ 



■COUNTERf^OlSE 



/I i.^^jT^f 



f^if/ftrc f). Alti'i'n^.ih- fnffcffffft arr({f}fff'^tf<f{t. fJifri^-fioffffL 



b. Figure 9 illust]'iit(-'S an altei'iiale method ustd'iil in terrain 
where (here aro no ti'oe>^. '['he genera] di recti oji of th<^ onerny 
receiver must bv. known. The counterpoise should r)e unreeled and 
laid on the g-round in a serambled fashion about the unit. Th(^ 
antenna should be unreeled and stroichod mxl fuh length ]>ointiny.' 
toward the eiu^mv receiver. 




lf-|?5,P=T 



f. --CQuNTtf'PClSt 



Fifprn- i{}. Aihs-f-.i-tf ^titti rnui [nynuin rfiiuf. ,ify}fd''yi(:fiinn!J. 



c. F]}>"ure 10 showt^ an aittcnna arrangement ^^■^li{■h may be usett 
when the dii'ectit.^n of Ihe enemy receiver is doidjlful iv.v] no tree.^ 
are nearby. It should be noted that at least two of each type trans- 
mitter must be used tor this layout. 

12 



PART THREE 
MAINTENANCE INSTRUCTIONS 



NOT APPLICABLE 






PART FOUR 
AUXILIARY EQUIPMENT 



NOT USED 



ir> 



PART FIVE 
REPAIR INSTRUCTIONS 

Ai'iiiy Gi^fHJJj'-; [■'oTut?^ iiriiL Ai'iny St.-r'^-i^:<? Vctrci}^ wili So rfiKri'tt^f] on 
\V,f)., A,C^(^ Ko]-]-n N"o. 4fi^ (Ttii-^iitisfacto ry Kr^uipmerit '-^-pni't ) ; hy 
Army Air Ko].'c^>. i-n Ai'iny Ai:' yiijx^c=5^ P'ni'ni No. -■4 ( Uii:^a1.i> J'arttJ]\ 
l-ic.'IKjfU , li f.'iUuM' i'orm i^ v.oi ;!.vailal)lr, nrcjiart.- the aa^a au;f>j;'Linfi- 
lo tlie sample [oriu repruiiucef I in ti^'uru Vl. 

SECTION V 
THEORY OF EQUIPMENT 

17, GENERAL 

Each unit of tlii^ sot is a siinple s]>a!'k iransmittor \vhic:h will 
jam onciiny viidlo rnmiT]un:t.-a( iuns u\'(^r a \-Qvy wldv l^arid of jVt^- 
qi.]oiu"^los. Thus, fewe}' traii.-mittei' mnts nvv r(n]UiiT<! Cor janunitiL^- 
an o\t.]-omcly wide ranj^^^ of iV^^iiu^iu-if^-^, Spark i]ile]'l"erenf(^ is ] par- 
ticularly offectivo aj:-aijisl ampliUidc-nnxlulalecl si finals, \vi(k."l.\' 
used by tho onomy. Siiu^e I he oqui].HTi(.nn i.s ox}>oiidal)lo auti has a 
short lit\\ th(^ dt:si<i:n of this etiuit^mrnt Is as simjUe as l.>ossibh^ 

78. SIMPLIFIED SCHEMATIC DIAGRAM. 

For the follo^viujj; circuit analysis, j'efer to the schema tit: diagram 
(fig. 11). 

o. When switches SWl aiul S\V2 ai-e c"]t>st^d. ctirrent flows frum 
the 12 -volt battery supply through s\^' itches SWl and SW2, vi- 
brator VKl, and the p li ma ry of Uie inducliuii coil to the rK^g'ative 
side of the battery. Time switch SWl is operat(^d by the time cl<»ck, 
and is also controlled by the lever which )"}rovides Instant or delayed 
operation. lioth switches must be closed lo make the unit operate. 
To pre\'eni operation of the unit before it is desired, n taster 
switch SW2 remains open until the counterpoise reel is removed. 
At this time, s^vitch SW2 closes automalicahy, 

b, I'he vibrator interrupts the direct current, so that a pulsatin^^ 
current flows through the primary of induction coil TI. Capacitoj- 
Ct reduces sparking at the vibrator iKunts. The jndsatin^r current 
in the primary induces a hi^-h voltage across the secondary oj' in- 
duction coil TT This high voltage is applied across ea]iac!tf>r (;2 
which is part of the radio-frequency {r-1") oscillating circuit com- 
posed of coil LI and capacitor C:^. This high voltage breaks dov.m 
ihe spark gap SI. so that capacitor (2 discliarges through coil T.l 
and r-f oscillations occur in this circuiL Theso oscillations continue 
until the energy is dissipated and the spark gap bec<;mes noncou- 



iiiuiiii^\ A; vi[i:h siu't't'ssiw }ii<.4i-v(.)Ha|J:'i' jnilse fi'oni Uk- iiidiK'tinsi 
■/oil sc<.-un(lar\\ Ihe :^|i;:rk K^ip brt'aks clowii jukI r-f iisL-illatiuns 

c. As n n-sult of Ihis HClioji, a seri*.'^ of damiied wuvi's an.' ii'vn- 
tiTalod by thi^ trausinillov. 'Vhv avt-ruj.^' fi'tMiiU'iu^v of llic osciila- 
ti[)[is is tk'lri-inincii lj\' ihv ri'soniuil frtMiiiriK'y oj" 1 iu.' osciilalttry 
rii'fuil C'2 ami 1,1. Tlit' r-l' puwiT K<-''ii'i''Lt.e(l b\' the traiismitU't' is 
l'i.'f] lo Xhv anU-nna system ci)ni]>osetl of a ^Wiu^/ht-w'wv antt-nna 
and a couiilci'iioisr. Coil 1.2 is usrd on low-ri-cnucncy Uadi<t 1'i"ans- 
ndtU'i-s T-i:':) PRT-1, T-KiG IMlT-1. and T-i;i7 I'RT-1 as a Inad- 
iriK (.-oil wliich elect ri^.-a II \' lo(tiJ;thens tlu' antenna. 



SW I SW2 



CI 



■=r Bl 



-L- VBI I 



C2 





L2 



SI 




T 



NEW SYMBOL 



rti 



note: coil L2 IS USED ON RADIO TRANS- 
MITTERS T-I35/PRT-I,T-136/PRT-1, AND 
T'137/PRT-L COIL L2 IS OMITTED ON RADIO 
TRANSMITTERS T-I3e/PRT-I, T-I39/PRT-I 
AND T-I40/PRT-I. 

TL 15947A 



m 



LEGEND 



Radio Transmitter T-135 Radio Transmitter T-137 

i\ li.o-irif, iM}-\- i-afjaci[0]' (."1 if.-'-rtif, ^iu^l-^■ c\i pnU-i i o-- 

r-^ il.iliL"h-:-Hi f i-;LpHK':tfiv < r: :.t:ii ii!:-:i- ■ TlI ^'l.i '<)LI 'j-Ji! 1' riL i 'ijv i 1 h i y ( rOi.i f> i ->■■: I 

rjf Tw.h i).ij|-!in" L-af);u-:. <jr-.-: 1 :.:' ^i-.jy i^'H-inr ij !i;u--L-'is i 

1 jirn.i -^- 1 .iU:iji-\- 

JJ ].:;!^iij: i n- 'iLrl .:i- T.I :^.]^---h iMd\i.-i..v 

l.lj! ll.l-uh iji.iiJi'r'iT" T.L! l.;]-!ji" \::\h\r]\w 

SI Siiiirk .^'ap SI S|>ru'--^ ;:.'ap 

S\V] Tiiiii' swiirh SW'l "["iiic sv.iU'li 

•<\\'-J. ^]a>t^i- ^viA-h SW'^; AI:j.u-i ^\viuh 

']' 1 l:-::''.iL.-t i:'^i c.iil : Tl 1 !i'. Ur: i-jj". c-iil : 

!'i-:iiiai-\-, ;:^ii ar. F^-irnai-v, k^') .lit 



S^ ..".ai.^a-\\ ::.i;4 h Sfc^.^ra j\\ ::.:^l I 



Radio Transmitter T-ISi Radio Trcnsmitter T-138 

1:^1 ]:^v dv>-L'r:i Inniiry \U ]-^-v ■jry-^-i-il IjiiUny 

n il.'-iVif, 'iO^I-\■ rai'iu'i:0]- <."i II. -■-nil'. JliH)-\ rajiaritoi' 

{''■J. [].\}y]:\:\-u]\' H-:L|Kn-iii?f ( v-i)f>:fu>:^--i| T'J "\")^n T'l-mr" in fiacirnr < i-irrrifj(>>.i\l 

o: r^.^■^'^■ iiJM-n:!" i-"afjacji()i-s ) ;?!' ffhUr O.^nT-^rf i-Jtfiaritois y 

I .'?rni ■\' ] j.im-v 

I.I "lafS^-uh i?-,iiiu-r(?y 1,1 I.-^I'-uIl i n:!ijri ■ ir 

I'J. l."W-iiM i?-"iiijrrn]' SI S|i;jrk Lia]i 

SI Si^ai'k [i-,[\y SW] Tinu- -:\\i;i-h 

SW'::! ^[a^lu]■ -wurli Tl I r: . I ■.!.'! a a i r^^i]: 

'I'] f M'lii;-: I'-a ''^i.: I't'iaaiJ-y. Ilin ah 

}'ri--ary. llj^U :*]\ <-. .-..adm-y. a.^I-l h 



Rcdfo Trortsmitter T-139 Rodio Transtnitter T-140 

in ll^-v ."ry-c^i; r,aUta-\ ]\\ [•^-v .jv^-raii hatu-y 

^"f 0.."inii\ ainj-v rai^ar-ua' (1 <).>-ni]", '^(la v rapariior 

t '- a.oa i:^-:"^-- -" 1-^; I lata :■.'!■ i i-on: ih':-:- I '"_ a . a i:- a s..- . m f ^a p.-a a-- .r n- 

::;" Ina ". MhL--. i" :-LLi.ai:1i-:- I ;'■'.-.. -i m" - :\ = ' . ' ) a "i - a i T 

laiiH> V rafai^'ti--:- \ \ aiihi \- 

[J ] ai-! aa i III' IU-" ■■■! 1.1 I j.Kr.-\j|i i^-;. :ih" ■■■!■ 

SI Spai'A LJL^:i S [ SaM k -af' 

S\\ 1 'f':nu- >v\-:U-fi SWl Tin-i- ^wilrrL 

y-\\':'. Alii-ua- >- a,'- SW:^ .Ua.-lar ^^^:lr^ 

Tl 1- aan: -a .-..I : "[' ] I n- iar: i- ■:. a..:l : 

l'i':niai'>-, i'lw av. ['I'liaary, JL^i^ ah 

S. r-ai.'a. >". ■'.I^ ] ." S. i-:::i.ia:\ , ■.:: I ■■ 



0^ 



SECTION VI 
TROUBLE SHOOTING 

NOT APPLICABLE 



SECTION VII 
REPAIRS 



19. G- ENERAL 



S]]-\ ^:v iiatlin S<^t. AX i'K'J'-J is :ui i^xpondMble itt^m, nu i\'\^i[]r 
iiisin. ;. t;l.!(;fis urv n.^iiuirvii. I)t^t\^c1.iv*.^ t^cjUtiHUi.^nt ;:^hnuhl Uv cl(^st rny^-H, 
al'trr- ^ieti^rriiiiiififj- lluit. no b-ulleries lijivc Ihh'ji h^ft \n Iho uuh. 

20. U B^SATISFACTORY EQUIPMENT REPORT. 

a. ^Viu^n n^niiljU' in {.-([uipnu^iU usi^j !)>■ Army Cn-nund f/'orv'.-- '►]' 
A\iu\- Hpi-vtrL' Knrct.^s uci'urs nuyvv. nfu^n lh;j.Ti I'et.niir |K^rr<oiniel [w] 
is n<i £ -mal, W'a]- I.H^parlnirjil Unsalisl'urlory Equipnu^iH Ut.-iirM'i. 
W.l.J. . A,(;.(). I^^>i-ni No, J(;S, should 1m- lill^^d out n\ul [ur\^■urd^d 
\\[vn\.i _y_yh L'liiinfirls to t liv Ollirf.' of tlR^ Chirt" Signal niiirt-r, \\";isli- 
iii.ulo r J 25, I), f \ 

b, "S^Vhej] U'oidjlr ill tujui])niont. us^mI !>y A]7iiy Aii- I^'ni'ct^s (fL^c'urs 
[^'^*f^' " d'h'H Shan [■L^j>air [H^fsoimol l"i\"I i> nni-niaK Ai^Tuy Air ^'^l■n^^ 
l^'orn- Si>. Ti-l slioukl 1)0 lilti^d oul and ^Ml■^^■al■ded Ihi^ou^ei] rluuun.l^. 

c- I^ f" i^ulhtT fni'nt is nu! avatlabh^ p|■r'l^art' llu-^ dal.a aurrjrd^i::^- -n 
'lir St I- niplr I'ni'in r(^i.)rudutt^d ]u [lirurc .11^, 



20 



WAK CtPAF^rMtNT 

UNSATiSFAaORV EQUIPMENT REPORT 



FOR 



FROM 



TO 



Signal Co^pp 



MATERIEL 



175 ^i£nal R*p&lr Ca 
Supply ^ec. Ho Fourth j.r:qy 51^ St A?0 IIP 



""l fab ^^ 

AiAi :iH 
Tir.iitii^.^.:. Ah ■l^■ :r 



COWPLF.TE MAJOR ITL.M 






5 -'aJi ^+5 



BC-l2j-i 

MA!-...^*-lTJncn- 

AjMrlcaji ?^aJdio Corp 

?LftdiD Set 5C3~A^i--X If, TanT rj IJadiuji, ttA 

neFECTIVE c6^^PON_^NT QES-^RlP^lON-ANlo'c^O^^ ' " "' "1^""" 

P..H7 HLi Sig ^ ' 'v-v CEipacj tor 02CJ;fij<Bd;; '-'■"■J^ '■■■■: -■■''■ '='■" hsiamjii 

StJt Ko.;?f:47-;? l-af ; 5^)C tqc* ' Amcrlcfer. Pjrf io Cd;:]: ^Wh^ii aaT^ufftci-ured 

L:£.S^.H.ir.:irl aK Fjm-uhI: aNu ixQAauLF C* ..■CC ■ jT -j J-. li:- ; j: r i' -■■■,--■'■■■■■:■ ■■: .=■■■■ . 

Capacitor '-^0 sKorts out d^ie to hujidJ operating conjltione 

C^rr L-:f NiTIXL -paUBtJ TUTAL T I h' t I'^ :; IV- L L h.l i -•fJ'TAL. HT-HI'-L-" CJ' (J'T-J^A" K.N IJLP Or>L P A T-U l-!L 



1^ Jan ^5 



10:0 5 



onir.?- C^C^CrriTio-J -or ijhjijQ>i.F.i. lun-u 



Operation in tr Capita; Y^ayv rn^ii^ftll. Was replflced and flfit filven Bolati:r<-pT^aof in^ 
end funpl proofing treatr^(?r-t , 20 Jan 15 -^ 



Tjq hmMi hir. r. n r^^i. : t>r .ini-N- r-ci/^^JoriNn. 






Substlt^jt* ciiaeitDr deait^ne-d for tropical op*j»aticn 



OBIGNATIHG CJFIICIR 



T-YT-ED MAMF. .^nypr ' wr. O^C *"H K-iTi 



E.A.ITilsL-ij, let Lt, ^If; C 
17^ Signal RetAlr Oo 






^J.£r^<^ 



FlR^r ENLlOii^EMLNT 



TrC--^MiiAL CtM-w CE 



TO CHIFF 

NAME G't'kOC. ^H-D DTATl-DN 



II .• lin;vn.llYr -il-i il-.- !... ' f r--lii: --a^ h r >- i:q ■■■ : vi i.> ! I 4 i!--l- 
Tl:.3 '-.r^- Id -^jiIkii- O v- '--.i! :■■■' JLih F'^-r^J »" : ='■ l-^- :■ h -n ■■■ i 



L Ji.' ;• 7-.t ul " ■■■j:.i!unj r:^-! v^-: I- 



.:-■" -■ I- 



I .:-■.■ ■ ■ ■■ . r ; r-f aHt ■■^CJ-JLk-i I.-:.:. . Ii j. ^r . it; . :^ 
.:i.::,::- r ^;-:lr^ ^jF-fx 



;r;-Tt .:: :iiiirr.-! 
:. ;--.-ilr::in [tKli |i; hrl.Kr.i^. ar-; |ir--r-' :i:c -n-.l r-.^.j T|h ^ ■. i. n- Ir 



■ r- /r-i-.- 



■ I:: 



■ -.rv. K,-. n- 



T '\'h -. T : -iT- -iili- i-ir II :■ |'\-.iv It ::■ '.r 



.■.-.■ .! '. ■ V-- :,'-i:-r- -.■<.•' y -In ;if r-r.-.nr ■. r--rf 0] ;if-'' .: : ■ J- -r-F.--; V r--. ■:■■■ -^i --n trj 

: -f-- V ;.:i ^ wi:' "i- '■■.rwii.-- .••'. -lin-rt <■■ Llir !■ -li r.:;hl -<:■■ .» ".' n L ^ >lli In- liir" ■ij--!->'l 



"■■. tj-., A.1-;. II. ]-:iTii ■^■i. *^i^ 



■\ :.■ . h I ■ ^ ■■■. \ . 



Fi'. 



ir,/J.. .l/j'.M. /-"'., ^^ .\':. ',>:>• ■■'■!ih y'i.:.:j>l<- I /..'.•■ 



21 



0'> 



SECTION VIM 
ALIGNMENT AND ADJUSTMENT 



NOT APPLICABLE 



APPENDIX 



SECTION IX 

REFERENCES 

21. F» 4JBLICATI0NS. 

i:^-^ TG 4-1 Allowance.-^ of" Exvu^ndablo SupfHit^^ 

"r^^ IG 1-2 All<twances r>f p]xi)endable Siipijiit'^^ iov Schools. 

TraiiHiiK Contei';^. aiifl Boards 

r^ i; l]-(; Dry RattiTv Supply Data 

_l_ B SKi fi Det'ense ajraiiust Radio Janiminj^ 

'i^il 1-155 Kl(H'ivif:al Finidamental^ 

"H^ il 11-155 Radio FundamonlaLs 

22. ^ ORMS, 

VS.M'),, A.li.O. Form No. 468 ( Unsati.'^ fact nry Kquipmctii 
Rep^n^t ) . 
_-A]'my Air Forces Form No. 51 ( I'nsatisfactory Rt^jjurt). 



23. ^ABBREVIATIONS. 

v^w eoiUinunus-v\-a\-e 

h . . h(:nr>' 

iv\ inch 

kr . _ kiloo'clo 



I ) 



pound 



niT . nuc r<>tarad 

Ml. . microhctn^y 

]'-f . .. ra^!H>-l"rcqL.icncy 

V . . volt 

24, CS^LOSSARY- 

lit -for tn glossary in 'l'.M 11-155, 



SECTION X 
MAINTENANCE PARTS 

25. P%-^AINTENANCE PARTS FOR RADIO SET AN/PRT-1. 

T'} -.. i.- i-atlio syl is inO prrcont oxi)t.'iulalj!<' ; i[ is used oru:*; fiihi 
llion t:i(-'stroytHl. Thert't'ore lht;i"o nri.' no mainteiiMfu-f jsai'ts [\}V ihis 

Oi'Jur Nc l^-'i'i'h-M I'h-^'i : ."'<)*:■■ conies: H' .hpu- 4. 
■I A